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Finding the Fourth Proportional to 121.03, 166.79 and 88.22

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Solution

The fourth proportional to 121.03, 166.79 and 88.22 is: 121.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.03 : 166.79 = 88.22 : x
  2. Step 2: Convert to fraction form
    121.03/166.79 = 88.22/x
  3. Step 3: Cross multiply
    121.03x = 166.79 × 88.22
  4. Step 4: Simplify right side
    121.03x = 14,714.85
  5. Step 5: Solve for x
    x = 14,714.85/121.03
  6. Step 6: Final answer
    x = 121.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.